How long does 'Babyhood last'

I had an exciting hour or two today, in our tiny space called our temporary lounge we had Hubby and I, two grandchildren, Eithan and Paige, Paige's Mummy and Grandma. But when I look back at the only picture that I took today I can't believe that Paige is already 24 weeks today, and she came in wearing these absolutely cute jeans.